Preview for PR #19 a059b90

Author: timtreis

pr-19/_sources/notebooks/examples/point_density.ipynb

@@ -265,7 +265,10 @@
     "## 4. Per-category density\n",
     "\n",
     "Colouring by a categorical column draws a **separate density per category** (via `datashader.by`).\n",
-    "Here, three marker genes selected with `groups` — each traces its own spatial distribution."
+    "Here, three marker genes selected with `groups` — each traces its own spatial distribution.\n",
+    "\n",
+    "With `groups` set and no `na_color`, transcripts outside the three genes are dropped entirely (not\n",
+    "greyed), so each density reflects only its own gene."
    ]
   },
   {

pr-19/notebooks/examples/point_density.html

@@ -551,6 +551,8 @@ <h2>3. Reshaping the intensity — <code class="docutils literal notranslate"><s
 <h2>4. Per-category density<a class="headerlink" href="#per-category-density" title="Link to this heading">#</a></h2>
 <p>Colouring by a categorical column draws a <strong>separate density per category</strong> (via <code class="docutils literal notranslate"><span class="pre">datashader.by</span></code>).
 Here, three marker genes selected with <code class="docutils literal notranslate"><span class="pre">groups</span></code> — each traces its own spatial distribution.</p>
+<p>With <code class="docutils literal notranslate"><span class="pre">groups</span></code> set and no <code class="docutils literal notranslate"><span class="pre">na_color</span></code>, transcripts outside the three genes are dropped entirely (not
+greyed), so each density reflects only its own gene.</p>
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 <div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">sdata</span><span class="o">.</span><span class="n">pl</span><span class="o">.</span><span class="n">render_points</span><span class="p">(</span>